All Definitions for Jack
Below are all the dictionary definitions of jack:
1A coarse medieval coat of defence, especially one made of leather.
2A man.
3A name applied to a hypothetical or typical man.
4A man, a fellow
5A typical man
6Men in general.
7A sailor.
8A policeman or detective
9(Australia) a military policeman.
10A lumberjack.
11A device or utensil.
12A device for turning a spit
13A smokejack or roasting jack.
14Each of a series of blocks in a harpsichord or the earlier virginal, communicating the action of the key to the quill
15Sometime also, a hopper in a modern piano.
16A tool used in manual production of glass objects (like bottles or wine glasses).
17A device used to hold a boot by the heel, to assist in removing the boot.
18A mechanical device used to raise and (temporarily) support a heavy object, now especially to lift one side of a motor vehicle when (e.g.) changing a tyre.
19Any of various levers for raising or lowering the sinkers which push the loops down on the needles in a knitting machine or stocking frame.
20A switch for a jack plug, a jackknife switch
21(more generally) a socket used to connect a device to a circuit, network etc.
22A non-tool object or thing.
23The lowest court card in a deck of standard playing cards, ranking between the 10 and queen, with an image of a knave or pageboy on it.
24A small, typically white, ball used as the target ball in bowls
25A jack-ball.
26A small ship's flag used as a signal or identifying device
27A small flag flown at the bow of the vessel.
28A small, six-pointed playing piece used in the game of jacks.
29A torch or other light used in hunting to attract or dazzle game at night.
30Money, cash.
31A strong alcoholic liquor, especially home-distilled or illicit.
32Nothing, not anything, jack shit.
33The eleventh batsman to come to the crease in an innings.
34A smooth often ovoid large gravel or small cobble in a natural water course.
35A plant or animal.
36A pike, especially when young.
37A male ass, especially when kept for breeding.
38Any of the marine fish in the family Carangidae.
39A jackrabbit.
40A large California rockfish, the bocaccio, Sebastes paucispinis.
41Mangifera caesia, related to the mango tree.
42Plant in the genus Arisaema, also known as Jack-in-the-pulpit, and capitalized Jack.
43Spadix of a plant (also capitalized Jack).
44Plant of the genus Emex, also considered synonymous to Rumex, if not then containing two species lesser jack and little jack for Emex spinosa syn. Rumex spinosus, Australian English three-corner jack and prickly jack for Emex australis syn. Rumex hypogaeus.
45To physically raise using a jack.
46To raise or increase.
47To increase the potency of an alcoholic beverage similarly to distillation by chilling it to below the freezing point of water, removing the water ice crystals that form, and leaving the still-liquid alcoholic portion.
48To steal (something), typically an automobile
49To rob (someone).
50To dance by moving the torso forward and backward in a rippling motion.
51To jack off, to masturbate.
52To fight.
53To jerk or move by jerking
54To remove or move (something).
55Tired, disillusioned
56Fed up (with).
57The edible fruit of the Asian tree (Artocarpus heterophyllus)
58Also the tree itself.
59The related tree Mangifera caesia.
60A home run.
61To hit (the ball) hard
62Especially, to hit (the ball) out of the field, producing a home run.
63A manual laborer.
64A sepoy.
65A support for wood being sawn
66A sawhorse or sawbuck.
67A wedge for separating rocks rent by blasting.
68A grating device used to separate and guide the threads in a warping machine
69A heck-box.
70A machine for twisting the sliver as it leaves a carding machine, in the preparation of yarn.
71A pitcher or other vessel for holding liquid, especially alcoholic drink
72A black-jack.
73A measure of liquid corresponding to a quarter of a pint.
74A fake coin designed to look like a sovereign.
75A jackcrosstree.
76A unisex given name derived from a pet form of the name John. Occasionally a diminutive of other given names such as Jackson, Jacob, Jacqueline or Jonathan.
77Jack Daniel's, a brand of Tennessee whiskey.
78A placeholder or conventional name for any man, particularly a younger, lower-class man.
79A surname.
80An unincorporated community in Coffee County, Alabama, United States.
81An unincorporated community in Dent County, Missouri, United States.
82A jacqueminot rose.
83Ellipsis of Monterey Jack, a type of cheese. [A mild, white American cheese similar to cheddar.]
84Ellipsis of Jack Tar, a sailor.
85Ellipsis of Jack Rum, a soldier.
About synonyms for jack
Finding the right synonym for jack helps writers avoid repetition and add precision to their work. Defined as "A coarse medieval coat of defence, especially one made of leather.", jack has 9 alternatives that can fit different contexts and tones.
Each synonym carries a slightly different shade of meaning. Jackass is the most direct replacement in most situations. Knave works well in formal or professional contexts. Jackstones is often preferred when the context calls for a more specific or nuanced expression.
When choosing a synonym, consider the connotation, formality level, and audience. Some alternatives work better in casual conversation while others shine in academic or professional writing. For example, using a more formal synonym in a business email can elevate your tone, while a casual synonym might feel more natural in creative writing or dialogue.
It is also worth noting that not all synonyms are perfectly interchangeable. The context of your sentence, the surrounding words, and the intended emotional impact all play a role in selecting the best alternative. The list above provides the most common and useful replacements for jack, but always read your sentence aloud to ensure the chosen word flows naturally.